Improved cylindrical cotter for leather and other materials



Y been used in pairs, the knives of each pair being. placed ates to wear intol the iiat face of its fellow a rebate, as

disks is necessary to keep the cutters in working-order.

vother in the way I have described for the disk-knives,

-marked b, both cutters having extensions beyond said JAMES H. GoLD1Ne,'oE LIVERPOOL, ENGLAND, .AssiGNoE To HIM- s ELE AND PATRICK MARE-1N, 0E SAME PLACE.

Letters Potent No`. 8'5,08'5, dated December 22, 1868.

IMPRVED QYLINDRICAL CUTTER FOR LEATHER AND OTHER MATERIALS.l

Fam- 'rna schedule referred so m zum Letters Patent and making of @ne same;-

To all whom it ma/y come/rn.:

B e it known that I, JAMES H. GOLDING, of Liverpool, England, residing in Boston, county of Suffolk, and State of Massachusetts, have invented anIrnpro've7 ment in Cylindrical Cutters for Leather or other sheetm'ateiial; and I do hereby declare that the following, taken in connection with the-drawings which accompany and formpart of this specification, is a description of my invention, sufficient to enable those skilled in the art to practise it.

For cutting leather and. skins into strips, such as belting, shoe-binding, 85o., disk-knives or cutters have on separate shafts, and so arranged thereon that their ilat surfaces are located 'in the same plane, the said flat surfaces being kept in Contact by springs, which, being under stress, tend to movethe knives o r cutters to' wards each other. u The difficulty with such cutters is, thateacli operrepresented, in an exaggelated form, in the detail A, of the drawing, and this wear also dulls the edge of each disk, so that constant or frequent grinding of the By my invention, I prduce circular cutters which operate in pairs, each cutter of each pair bein g'arran ged o'n its shaft, like the disk-cuttersbefore'alluded to, my circular cutters being, at their operative parts, Vhollow cylinders, with their plane faces in contact, and so located and arranged, with respect to each other, that the end plane or base of each' hollow cylinder wears itself and its fellow always in and to a true'plane, by .which the cutting-comer o1' angle of each hollow 'cylinder, formed by the junction'of the outer-periphery with the base-plane, is always kept sharp.

Solid cylinders, working` together in pairs, arranged substantially as are thedisk-kniyes before alludedv to, and as are my hollow cylindrical'knives, wear into each and require frequent grinding.

My invention, therefore, is an improvement upon 'pairs of solid cylindrical knives orcutters, aswell as. upon disk-knives or cutters'working together in pairs.

In the drawings- Figure 1 shows a cross-section ofa machine arranged withcutters,embodying my invention, the machine being lshown as adapted to' present and convey-flexible material to the cutters, though the cutters will also operate perfectly in slitting or .cutting into strips, sheets, ora-bars, or plates of rigid material.

Figure 2-,of the drawings, shows a section on 'the line z z of iig'. l, exhibiting clearly the relation of the flat ends of the hollow cylindrical knives or cutters.

The hollow cylindrical part of one cutter is marked c, and the corresponding part of the other cutter is part-s, fitting-on their respective shafts, o and d, sothat wiiile the cutters must turn -with the shafts, they can also slide endwise thereon toward each other, the shafts having 'each a spline-way cut therein, and a spline or pi'nineach cutter-fitting into the spline-way of its `or otherwise, and rubber or other suitable springs, j',

are compressed between'said collars and those ends of the cutters which do not come into contact with each other.-

The shafts-camld .are located at such a distance apart as to have the inner or 'concave surface of each` hollow cylinder, at thel crossing vor intersection of the faces of the two hollow'cylinders or cutters, coincide at -V one point with the outer or convex surface of the other hollow cylindlical cutter, and the shafts may, with good results, or4 at least-without any-bad effect, be located even a little nearer together than the described loc tion'of the cutters would bring. them, and, in.- either case, the Hat face of each will wipe and wear the entire flat face of the other cutter, so' that n'o groove or rebate canbe worn byone cutter into the flat face ofthe other, and hence it follows that the faces of the hollow cylindrical cutters must always wear in perfect planes,

by which the sharpness of the cutting-corner or anglev of each cutter will be preserved or maintained. v For cutting a wide sheet into several strips, several pairs of cutters, like those' described, may be mounted onthe shafts c and d.

The rest of the machine shown is not of the essence of my invention, and merely shows 'a Way of presenting and conveying flexible material tothe action of 4my cutters.

y denotes a roll, on which is Wound the iiexable ma. terial, h, to be cut, said material passing over bar (i, roll l j, and bar 7c, to smooth the materiaL/t, and produce tension thereupon. The material, after passing the cuttels, and being operated on by them, passes. over b'arl,

'roll m, to feed-rollt?, by which the material is'drawn oli' of roll y, and is drawn through the machine to be delivered to the take-up roll o, on which it is wound up. The delivery-roll y and Itak'efup-roll o, or either of them, may have provision for lateral adjustment to properly gauge'the presentation of the material to the cutters.

For cutting sheets of stiifmaterial, pairs of feed-rolls s to present to and to remove the material from the cut' ters, o r a table or rolls, or a carriage, may be provided,

' and the material may be pushed thereon to the action of the cutters, gauges being used, if desirable, to determine the relation of the presentationof the material to the cutters;l Y

I claim a cutting-machine, in which are combined hollow cylindrical cutters, so arranged that their at faces will wear each' other in planes, substantially as described.

Witnesses:

" J. SB. CROSBY,

-lfEANcrs Gonne.

JAMES H. comme'. 

